Questions tagged [posix-compliant]
The posix-compliant tag has no usage guidance.
11
questions
3
votes
1
answer
411
views
What's the difference between `;` and space when setting environment variable before running a command
I've been wondering what's the difference between the two:
CAROOT='certificates'; echo $CAROOT - prints the value, uses ; as separator between two commands
CAROOT='certificates' echo $CAROOT - prints ...
0
votes
1
answer
50
views
Bash from scratch --again
As my journey through Bash goes on, I'm still stuck on ridiculous stuff such as this script I just can't wrap my head around on:
#!/bin/bash
if [ $1 -gt 100 ]
then
echo "You typed a larger ...
- 25
5
votes
1
answer
1k
views
In bash `$-` yields `himBHs` but `i` and `s` are invalid options -- what's going on?
$ echo $-
himBHs
$ set -h
$ set -i
bash: set: -i: invalid option
set: usage: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
$ set -m
$ set -B
$ set -H
$ set -s
bash: set: -s: invalid option
...
- 829
5
votes
0
answers
3k
views
stropts.h install for Ubuntu 20.01 [closed]
I have just installed Ubuntu 20.04 and am trying to compile my pintOS project and it says stropts.h not found and I have researched a bit that it only works on Ubuntu 18.04. Someone share a way to ...
- 51
0
votes
1
answer
667
views
how to run an appimage app stored at a fat32 storage
As appimage aims to allow portability I was expecting something very similar to the apple .app format (apple.application-bundle) .
I don't know how to launch an app from an appimage file stored in a ...
- 101
-1
votes
1
answer
253
views
Why doesn’t Ubuntu's `time` follow the standard POSIX format and how do I change it?
If you measure times in Ubuntu 18.04, the result apears in a single line:
$ time sleep 1
sleep 1 0.00s user 0.00s system 0% cpu 1.003 total
This doesn’t align with the POSIX standard, as described ...
- 101
1
vote
1
answer
414
views
How compatible dash is with ksh?
Can I make /bin/sh symlinked to /bin/ksh instead of /bin/dash without breaking anything in the process ? Since they're both supposed to be POSIX-compliant, can I reasonably expect the replacement to ...
- 105k
0
votes
1
answer
176
views
Why sigset includes unadded SIGINT? [closed]
Wrote simple program to learn writing POSIX style signal handling.
#include <signal.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
static void sig_int(int);
...
anon
1
vote
2
answers
93
views
list files or dirs starting with 'jre'
I need to list files and dirs with names starting with jre (small and capital letters are allowed).
When I execute:
ls | grep jre
...it greps just low capital letters and gives output with jre not ...
- 4,537
3
votes
2
answers
14k
views
How to skip a record with awk
I have a large number of files in a log-directory, whose names were time-stamped (in this case with date +%b[...]).
I want to write a POSIX compliant one-liner that will:
either
skip lines output ...
- 2,761
189
votes
4
answers
194k
views
How to grep for tabs without using literal tabs and why does \t not work?
When I search for tabs in a file with (e)grep I use the litteral tab (^v + <tab>). I can not utilize \t as a replacement for tabs in regular expressions. With e.g. sed this expression works very ...
- 3,703